Technology Transfer Seminars, Pittsburgh and Denver, 1978. Coal mine fire and explosion prevention: proceedings 
U.S. Bureau of mines. 
 - Washington  Bureau of mines.  1978 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>CARBON
<br/><br/><label>Universal Decimal Class. No.: </label>622.822